摘要
用差示扫描量热仪(DSC)研究了4,4′-二氨基二苯甲烷环氧树脂(TGDDM)/4,4′-二氨基二苯基砜(DDS)环氧树脂体系及其多壁碳纳米管复合物的固化行为。碳纳米管加入TGDDM/DDS体系后,起始固化反应速率增大,达到最大反应速率的时间减小,说明碳纳米管对环氧树脂的固化反应有催化作用。和纯树脂相比,在固化反应初期碳纳米管复合物的活化能降低。在玻璃化现象出现以前,K am a l的固化动力学模型得到的结果与实验数据相当吻合。
The curing behaviors of tetraglycidyl-4, 4＇-diaminodiphenylmethane （TGDDM）/4, 4＇-diaminodiphenylsulphone （DDS） in composites with carbon nanotubes have been studied by differential scanning calorimetry （DSC） technique. With carbon nanotubes incorporated into the TGDDM/DDS system, initial cure rate increased and the time to the maximum cure rate decreased. These results show the presence of carbon nanotubes exerts the acceleration effect on the cure reaction of epoxy. As compared with neat epoxy, the activation energy of carbon nanotubes/ epoxy composites is much lower in the initial stage of cure reaction. Cure kinetic model of Kamal agrees well with the experimental results before the vitrification effect.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2005年第5期235-238,共4页
Polymer Materials Science & Engineering
基金
江苏省科技项目(BG2002019)
国家教育部博士点基金项目(20030284003)
